Although we cannot completely resolve any possible low velocity HeI component, our observations rule out the presence of strong, RCB-like dust-driven mass loss in dLHdC stars. This is expected, as none of these stars (except A166) shows a significant IR excess (Tisserand et al. 2021, submitted). We note, however, that this does not rule out the possibility that dLHdC stars were forming dust at some point in their history (\(\gtrapprox 10\)  years ago). Observations of XX Cam – an RCB star that has not entered a dust-enshrouded decline for the last six decades – do not show any significant HeI features, similar to dLHdC stars [1]}. The dust-driven HeI wind is thus only a tracer of recent (few years to decades) dust-formation.
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